/** Line-based formats * * @file * @author Steffen Vogel * @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC * @license GNU General Public License (version 3) * * VILLASnode * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . *********************************************************************************/ #pragma once #include namespace villas { namespace node { class LineFormat : public Format { protected: virtual size_t sprintLine(char *buf, size_t len, const struct sample *smp) = 0; virtual size_t sscanLine(const char *buf, size_t len, struct sample *smp) = 0; char delimiter; /**< Newline delimiter. */ char comment; /**< Prefix for comment lines. */ bool skip_first_line; /**< While reading, the first line is skipped (header) */ bool print_header; /**< Before any data, a header line is printed */ bool first_line_skipped; bool header_printed; public: LineFormat(int fl, char delim = '\n', char com = '#') : Format(fl), delimiter(delim), comment(com), skip_first_line(false), print_header(true), first_line_skipped(false), header_printed(false) { } /** Print a header. */ virtual void header(FILE *f, const struct vlist *sigs) { header_printed = true; } virtual int sprint(char *buf, size_t len, size_t *wbytes, const struct sample * const smps[], unsigned cnt); virtual int sscan(const char *buf, size_t len, size_t *rbytes, struct sample * const smps[], unsigned cnt); virtual int scan(FILE *f, struct sample * const smps[], unsigned cnt); virtual int print(FILE *f, const struct sample * const smps[], unsigned cnt); virtual void parse(json_t *json); }; template class LineFormatPlugin : public FormatFactory { public: using FormatFactory::FormatFactory; virtual Format * make() { return new T(flags, delimiter); } /// Get plugin name virtual std::string getName() const { return name; } /// Get plugin description virtual std::string getDescription() const { return desc; } }; } /* namespace node */ } /* namespace villas */